two issues here for me.
1) Whilst the new stuff is a LOT better performance wise than the stuff from ten+ years ago, I am no better a rider (in fact recent excursions on - and then abruptly OFF - the bike have shown that I actually have less ability on a bike now) so therefore whilst my 'proper' bike is v nice, and has 27 gears, 185mm discs, decent 120mm forks - its way better than I will ever be, I will never push the kit too much.
2) (the most pertinent issue for me) In 1992, when I first picked up a MTB mag and looked at the pictures of the shiney lovely mountain bike things (I have always had bikes, its a family thing) I was hooked, but at the tender age of 12, and obviously through my teenage years I couldnt afford any of it. Now, I have slightly more money, but the 'stuff' is also less expensive.